function SelectGroup() {
    var TID = CPHttpRequest.InitThread();
    var group = document.getElementById("CC_CATEGORY_CATALOG").value;
    var obContainer = document.getElementById("div_CC_SERIES");
    
    if (group) {
        function ShowResult(data)
        {
            if (obContainer) {
                obContainer.innerHTML = data;
            }
        }
        
        CPHttpRequest.SetAction(TID, ShowResult);
        CPHttpRequest.Send(TID, '/select_group.php', {'group':group}); 
    } else {
        document.getElementById('CC_SERIES').disabled = true;
    }
}